Question
LPTIM does not count pulses from the COMP output
I want to count the pulses coming from COMP2's output using LPTIM1. However, when I send it to Tera Term, the displayed LPTIM value is consistently 1, and it doesn't match the COMP2 output.
Has anyone had this problem? How did you resolve it?
I would greatly appreciate it if there is an expert who can assist in fixing this issue.
I am using STM32Cube IDE Version: 1.10.1.
My MCU is STM32L051C8T, on a custom board
This is my clock
This my LPTIM configuration
this COMP configuration
this my code
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "lc_sensor_metering.c"
#include "stdio.h"
#include "stdint.h"
#include "string.h"
#include "stm32l0xx_hal.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
LcSensor_Sensor_f LcSensor1;
LcSensor_LcStatus_f LcStatus;
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
uint8_t aMsgBuffer[50];
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
COMP_HandleTypeDef hcomp2;
LPTIM_HandleTypeDef hlptim1;
UART_HandleTypeDef hlpuart1;
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_COMP2_Init(void);
static void MX_LPTIM1_Init(void);
static void MX_LPUART1_UART_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
LcSensor1.CountDetect = 2;
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_COMP2_Init();
MX_LPTIM1_Init();
MX_LPUART1_UART_Init();
/* USER CODE BEGIN 2 */
HAL_COMP_Start(&hcomp2);
uint32_t counterValue = HAL_LPTIM_ReadCounter(&hlptim1);
//sprintf((char*) aMsgBuffer, "Batas deteksi:%d\r\n",counterValue);
//HAL_UART_Transmit(&hlpuart1, aMsgBuffer, TXBUFFERSIZE(aMsgBuffer),0xFFFF);
//HAL_UART_Transmit(&hlpuart1, "dua", 10, 1000);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
HAL_LPTIM_ReadCounter(&hlptim1);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_3, SET);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_1, SET);
LC_Init_GPIO();
// sprintf((char*) aMsgBuffer, "Batas deteksi:%d\r\n",LcSensor1.CountDetect);
// HAL_UART_Transmit(&hlpuart1, aMsgBuffer, TXBUFFERSIZE(aMsgBuffer),0xFFFF);
char buffer[50]; // Adjust the buffer size based on your needs
sprintf(buffer, "counter value: %3lu\r\n", counterValue);
HAL_UART_Transmit(&hlpuart1, (uint8_t*) buffer, strlen(buffer), HAL_MAX_DELAY);
HAL_Delay(1000);
//sprintf(buffer, "counter value: %lu\r\n", counterValue);
//HAL_UART_Transmit(&hlpuart1, (uint8_t*) buffer, strlen(buffer), HAL_MAX_DELAY);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV16;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_LPUART1|RCC_PERIPHCLK_LPTIM1;
PeriphClkInit.Lpuart1ClockSelection = RCC_LPUART1CLKSOURCE_PCLK1;
PeriphClkInit.LptimClockSelection = RCC_LPTIM1CLKSOURCE_PCLK;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief COMP2 Initialization Function
* @PAram None
* @retval None
*/
static void MX_COMP2_Init(void)
{
/* USER CODE BEGIN COMP2_Init 0 */
/* USER CODE END COMP2_Init 0 */
/* USER CODE BEGIN COMP2_Init 1 */
/* USER CODE END COMP2_Init 1 */
hcomp2.Instance = COMP2;
hcomp2.Init.InvertingInput = COMP_INPUT_MINUS_IO1;
hcomp2.Init.NonInvertingInput = COMP_INPUT_PLUS_IO3;
hcomp2.Init.LPTIMConnection = COMP_LPTIMCONNECTION_IN1_ENABLED;
hcomp2.Init.OutputPol = COMP_OUTPUTPOL_NONINVERTED;
hcomp2.Init.Mode = COMP_POWERMODE_MEDIUMSPEED;
hcomp2.Init.WindowMode = COMP_WINDOWMODE_DISABLE;
hcomp2.Init.TriggerMode = COMP_TRIGGERMODE_NONE;
if (HAL_COMP_Init(&hcomp2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN COMP2_Init 2 */
/* USER CODE END COMP2_Init 2 */
}
/**
* @brief LPTIM1 Initialization Function
* @PAram None
* @retval None
*/
static void MX_LPTIM1_Init(void)
{
/* USER CODE BEGIN LPTIM1_Init 0 */
/* USER CODE END LPTIM1_Init 0 */
/* USER CODE BEGIN LPTIM1_Init 1 */
/* USER CODE END LPTIM1_Init 1 */
hlptim1.Instance = LPTIM1;
hlptim1.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC;
hlptim1.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV1;
hlptim1.Init.UltraLowPowerClock.Polarity = LPTIM_CLOCKPOLARITY_RISING;
hlptim1.Init.UltraLowPowerClock.SampleTime = LPTIM_CLOCKSAMPLETIME_DIRECTTRANSITION;
hlptim1.Init.Trigger.Source = LPTIM_TRIGSOURCE_SOFTWARE;
hlptim1.Init.OutputPolarity = LPTIM_OUTPUTPOLARITY_HIGH;
hlptim1.Init.UpdateMode = LPTIM_UPDATE_IMMEDIATE;
hlptim1.Init.CounterSource = LPTIM_COUNTERSOURCE_EXTERNAL;
if (HAL_LPTIM_Init(&hlptim1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN LPTIM1_Init 2 */
if (HAL_LPTIM_Counter_Start(&hlptim1, 0xFFFF) != HAL_OK)
{
Error_Handler();
}
/* USER CODE END LPTIM1_Init 2 */
}
/**
* @brief LPUART1 Initialization Function
* @PAram None
* @retval None
*/
static void MX_LPUART1_UART_Init(void)
{
/* USER CODE BEGIN LPUART1_Init 0 */
/* USER CODE END LPUART1_Init 0 */
/* USER CODE BEGIN LPUART1_Init 1 */
/* USER CODE END LPUART1_Init 1 */
hlpuart1.Instance = LPUART1;
hlpuart1.Init.BaudRate = 9600;
hlpuart1.Init.WordLength = UART_WORDLENGTH_8B;
hlpuart1.Init.StopBits = UART_STOPBITS_1;
hlpuart1.Init.Parity = UART_PARITY_NONE;
hlpuart1.Init.Mode = UART_MODE_TX_RX;
hlpuart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
hlpuart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
hlpuart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&hlpuart1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN LPUART1_Init 2 */
/* USER CODE END LPUART1_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @PAram None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOH_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_1|GPIO_PIN_3, GPIO_PIN_RESET);
/*Configure GPIO pins : PA1 PA3 */
GPIO_InitStruct.Pin = GPIO_PIN_1|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
